Understanding Variables in Programming

In JavaScript, which keyword is used to declare a variable?

• var

• let

• const

• int

What is the purpose of the assignment operator in JavaScript?

• To add numbers

• To assign a value to a variable

• To compare values

• To declare a variable.

When using CamelCase in JavaScript, how should words be written?

• All lowercase

• All uppercase

• Words together with capitalized first letters

• Words separated by spaces.

Fill in the blank: The keyword 'let' is only needed when ____ a variable.

• reassigning

• creating

• deleting

• printing

What analogy is used to explain variables in the document?

• A tree

• A box

• A river

• A mountain

What types of values can we store in variables in JavaScript?

• Numbers, booleans, and strings

• Only numbers

• Only strings

• Only booleans.

Which of the following is an example of an integer in JavaScript?

• 3.14

• 0

• 22.3

• 99.99

What is a boolean variable?

• A variable that stores text

• A variable that can be true or false

• A variable that stores numbers

• A variable that stores decimals.

Fill in the blank: String concatenation in JavaScript is used to ______.

• Add numbers

• Combine strings

• Store booleans

• Create decimals

What is the result of concatenating 'Hello' and 'World' in JavaScript?

• HelloWorld

• Hello World

• Hello+World

• Hello-World